Helium in a pistoncylinder assembly undergoes a Stirling cycle. In the isothermal compression, the helium is compressed from 15 lbf/in.2 , 1008F, to 150 lbf/in.2 The isothermal expansion occurs at 15008F. Assuming the ideal gas model and ignoring kinetic and potential energy effects, determine (a) the work and heat transfer, in Btu per lb of helium, for each process in the cycle. (b) the thermal efficiency.

Department of Mechanical Engineering Tutorial 1 NATIONAL UNIVERSITY OF SINGAPORE AY 2016/17 ME2142 Feedback Control Systems Sem 2 T1.1. Find the Laplace Transform of the following functions: ▯ ▯▯▯ 2sin3 ▯▯2 ▯ ,▯▯2 a) ▯ ▯ ▯▯ ▯ b) ▯ ▯ ▯▯ 2 ▯ ▯ 0 , c) d) T1.2. Find the inverse Laplace transform of the following functions